试图在不修改Log4J源码情况下,用静态方法打印正确日志信息失败

 1package com.unmi;
 2import org.apache.log4j.Logger;
 3
 4public class MyLogger
 5{
 6    //留待Aspecj来初始化
 7    public static Logger log;
 8
 9    //打印日志的方法
10    public static void debug(String msg)
11    {
12        log.debug(msg);
13    }
14}

 1package com.unmi;
 2public class MyClass
 3{
 4    public void foo()
 5    {
 6        //希望打印日志定位是在这一行
 7        MyLogger.debug("Hello MyLogger");
 8    }
 9
10    public static final void main(String args[])
11    {
12        MyClass myObject = new MyClass();
13        myObject.foo();
14    }
15}

 1package com.unmi;
 2import org.apache.log4j.Logger;
 3
 4public aspect LoggerRecipe
 5{
 6    //拦截MyLogger中的所有日志打印方法
 7    pointcut logMethod():call(public void com.unmi.MyLogger.*(..));
 8
 9    void around():logMethod()
10    {
11        //能获取到需打印日志的类实例
12        Class clz = thisJoinPoint.getThis().getClass();
13        System.out.println("Construct Logger by Class: "+clz);
14
15        //在执行日志方法前初始化Logger实例
16        MyLogger.log = Logger.getLogger(clz);
17
18        //执行实际的日志打印方法
19        proceed();
20    }
21}

1log4j.rootLogger=DEBUG,console
2log4j.appender.console=org.apache.log4j.ConsoleAppender
3log4j.appender.console.layout=org.apache.log4j.PatternLayout
4log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%5p] %l %m%n

1before(Method method, Object[] args, Object target) throws Throwabel
2{
3    Logger log = Logger.getLogger(target.getClass());
4    log.debug(method.getName());
5}